Quote:
Originally Posted by THE EVIL TW1N
Maybe on a mustang dyno those %'s will hold up, but not on a Dynojet. For reference, look at all the SAE Certified engines and see what they dyno at the wheels. You will see that the typical set up loses ~12% for a manual, ~15% for the auto on a dynojet.
To be losing 20+% at the wheels, you must be running a 9" rear end + an inefficient transmission, such as a C6 or maybe even a TH400.
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Quote:
Originally Posted by THE EVIL TW1N
Those are a little on the low side, but either way, your math is wrong. To correctly find the HP would be to DIVIDE 422 by .8x to find the loss. EXA) 422 / .85 (15% loss) would be ~497 hp.
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Ok so based on that we will say your 12% and my 18% where of . So it seems that 15% is correct for a solid axle stick car , so 18% for IRS would be normal loss for stick car , 20-21 % for auto IRS [ assuming 4l60e and one piece drive shaft ] and we are back to my original 23-24% for 2 piece drive shaft and 6l80e . You can add drivetrain componants and not add to the loss .